This guideline provides evidence-informed guidance on the use of non-sugar sweeteners to reduce the risk of unhealthy weight gain and diet-related noncommunicable diseases in adults and children. The guidance in this guideline is not based on toxicological assessments of the safety of individual non-sugar sweeteners and is therefore not intended to update or replace guidance on safe or maximal levels of intake established by the Joint Food and Agriculture Organization of the United Nations (FAO)/WHO Expert Committee on Food Additives (JECFA) or other authoritative bodies.